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What Is Nvidia SLI? A Basic Definition

(Image credit: Nvidia)

SLI stands for scalable link interface. This is a graphics technology coined by Nvidia that allows your PC to run two Nvidia SLI-branded GPUs (aka graphics cards aka video cards) simultaneously. To do so, you’ll also need an SLI-certified motherboard and an SLI connector.

In Nvidia’s own words: “NVIDIA SLI intelligently scales graphics performance by combining multiple Georce GTX GPUs on an SLI-certified motherboard. … SLI features an intelligent communication protocol embedded in the GPU, a high-speed digital interface to facilitate data flow between the two graphics cards and a complete software suite providing dynamic load balancing, advanced rendering and compositing to ensure maximum compatibility and performance in today’s latest games.”

Nvidia currently has a long list of SLI-capable GPUs.

This article is part of the Tom's Hardware Glossary.

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Scharon Harding

Scharon Harding is a Senior Editor at Tom's Hardware. She has a special affinity for gaming peripherals (especially monitors), laptops and virtual reality. Previously, Scharon covered business technology, including hardware, software, cyber security, cloud and other IT happenings, at Channelnomics, with bylines at CRN UK.